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当量比
相关语句
  equivalence ratio
    Experimental Investigations of the Effect of Equivalence Ratio on Detonation Characteristic Parameters of Pulse Detonation Rocket Engines
    当量比对脉冲爆震火箭发动机爆震特性影响的实验研究
短句来源
    The effects of temperature and equivalence ratio of supersonic premixed combustible flow on the structure of supersonic combustion flow field, ignition and flame propagation were studied.
    研究了超声速预混可燃气流的温度以及当量比对超声速燃烧流场结构、点火与火焰传播特性的影响。
短句来源
    The stable burning can be observed when the premixed gas velocity changed from 0.57m/s to 18.4m/s in suitable hydrogen-air equivalence ratio.
    在适当的氢气/空气当量比下,混合气流速从0.57m/s到18.4m/s部可以在管道中维持长时间稳定燃烧。
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    The results show that the vaporizing flameholder can operate normally in the coming flow with low pressure of 68kPa and high temperature of 873K and it's combustion efficiency is above 0.9 and the total pressure recovery ratio ranges from 0.9 to 0.92.It also shows that the combustion efficiency decreases with the fuel equivalence ratio increasing and increases with the inlet air temperature increasing.
    试验表明,蒸发式稳定器能够在来流低压68kPa高温873K条件下稳定工作,燃烧效率大于0.9,总压恢复系数在0.9~0.92,燃烧效率随燃油当量比增加而下降,随来流进气温度增加而增加。 研究结果为冲压发动机蒸发式稳定器设计提供了参考。
短句来源
    2. The temperature distribution and the maximum temperature inside the porous medium combustor, the combustion efficiency and the levels of NO and CO emissions dependstrongly on the major parameters (gas flow velocity, fuel-air equivalence ratio and half cycle period).
    随着气体的流速增大,最高温度明显升高,高温区加宽,出口温度升高,燃烧效率降低,而CO排放含量增大,NO排放含量增大; 随着当量比的增大,最高温度增大,高温区域增宽,燃烧效率提高,而CO排放含量减小,NO含量增大;
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  the equivalence ratio
    The experimental results indicated that the thrust and the specific impulse increase with the increase of the equivalence ratio under different equivalence ratio ranging from 0.5 to 1.7. It means that the increase of the equivalence ratio can increase the performance of PDRE.
    在当量比0.5—1.7的范围之内,脉冲爆震火箭发动机的推力和比冲随当量比的增大而增大,即当量比的增加能够提升发动机的性能。
短句来源
    When the equivalence ratio of the premixed flow is exactly stoichiometric, the combustion temperature reaches the highest.
    预混气流的当量比为化学恰当比时,燃烧温度最高;
短句来源
  “当量比”译为未确定词的双语例句
    At the combustor outlet, the total pressure loss coefficients of the non-cold state cases were 0.565, 0.696 and 0.725, respectively and consistent with the experimental measurement values.
    在各个飞行马赫数和当量比条件下,燃烧室出口总压损失分别是0·565,0·696和0·725,都接近试验测量值;
短句来源
    CALCULATION METHODS ON EQUIVELENCE RATIO OF MULTI-PROPELLANT FOR PROPULSION SYSTEM
    组合发动机多种燃料和多种氧化剂的当量比计算法
短句来源
    Many parameters, such as the fuel jet pressure drop, the equivalent fuel/air ratio, the position of the fuel injectors, the relative penetration depth of the fuel jet, the ignition method, the structural parameters of the combustor, the structural parameters of the cavity, and so on, do have influences on the combustion performance of the scramjet combustor.
    燃料喷注压降和当量比、燃料喷嘴位置、燃料射流相对穿透度、点火方式、燃烧室结构、凹腔火焰稳定器结构等因素影响发动机燃烧室燃烧性能。
短句来源
    2) An analytical model for the performance of a single-cycle pulse detonation engine is established. Relations between performance parameters of PDE and parameter of equivalence ration, initial temperature, initial pressure and frequency are analyzed and calculated.
    2) 建立了脉冲爆震发动机单次循环的性能分析模型,分析计算了脉冲爆震发动机各种性能参数与当量比、初始温度、初始压力和频率等参数的关系。
短句来源
    The & function is dependent only on temperature and independent of hydrogen-carbon ratio of the fuel and fuel-air ratio for CnHm-air system.
    对于C_nH_m-空气系统,δ函数只与温度有关,而与燃料氢碳比以及燃气当量比无关。
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  equivalence ratio
Ignition delay time behind a reflected shock wave is measured for a lean propane-air mixture with an equivalence ratio of ? = 0.5 in wide temperature and pressure ranges (T = 880-1500 K, P = 2-500 atm).
      
Both experiment and numerical simulation were made at inlet temperature of 553 K, inlet velocity of 3 to 7 m/s and equivalence ratio of 0.3 to 0.5.
      
The combustion timing advances with the increase of DTBP concentrations, coolant temperature and equivalence ratio.
      
The chemical form of the nitrogen affixed to the PP surface is strongly dependent on the flame equivalence ratio.
      
With both models, the dependence of the results on the stoichiometric coefficient and the equivalence ratio can be expressed in an explicit manner.
      
更多          
  the equivalence ratio
With both models, the dependence of the results on the stoichiometric coefficient and the equivalence ratio can be expressed in an explicit manner.
      
These initial conditions are expected to depend mainly on four parameters: the equivalence ratio of the mixture, the amount of the initial energy deposition, the initial temperature and pressure of the mixture.
      
As forCH4/C4H10 mixed fuel, detonation velocities and detonation limits as a function of the equivalence ratio of the whole mixture of mixed fuel coincided with those ofCH4 single fuel.
      
The numerical results show that the equivalence ratio $\Phi$ of the gas-mixture is high enough in order to have a non-reactive gas close to the wall which keeps constant the hydrogen temperature along the centre-body.
      
The equivalence ratio (test/reference) for the pharmacokinetic characteristics AUCnormwas 1.03 (geometric mean; 0.95-1.11, 90% confidence interval) and Cmax,norm1.01 (0.94-1.08).
      
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A new kind of thermodynamic properties is proposed which is designated by the name of b functionwhere θ1 and θ2 are θ functions of two reference fuels which, can be selected arbitrarily.The & function is dependent only on temperature and independent of hydrogen-carbon ratio of the fuel and fuel-air ratio for CnHm-air system. With the aid of the & function a set of generalized tables of thermodynamic properties has been worked out, which can be applied to obtaining the thermodynamic properties of CnHm-air system...

A new kind of thermodynamic properties is proposed which is designated by the name of b functionwhere θ1 and θ2 are θ functions of two reference fuels which, can be selected arbitrarily.The & function is dependent only on temperature and independent of hydrogen-carbon ratio of the fuel and fuel-air ratio for CnHm-air system. With the aid of the & function a set of generalized tables of thermodynamic properties has been worked out, which can be applied to obtaining the thermodynamic properties of CnHm-air system combustion products at any fuel-air ratio easily and exactly. A specimen of the generalized tables is given in this paper.

本文提出了一个新的热力性质——δ函数。 δ=θ_2-θ_1式中θ_1与θ_2为任意选定的两种基准燃料的θ函数。 对于C_nH_m-空气系统,δ函数只与温度有关,而与燃料氢碳比以及燃气当量比无关。借助于δ函数,编制了适用于任意燃料氢碳比(包括碳与氢)的通用燃气热力性质表。利用此表可以方便而准确地计算C_nH_m-空气系统在任意当量比下的燃气热力性质。文中给出了该表的样表。

The experimental investigation with a model scramjet combu-stor which consists of rearward-facing step and diverging duct was carried out by using electric arc-heated air to simulate combustor inlet Mach number 2.1, total pressure0.7MPa and total temperature1200K.The fuel was injected parallelly or perpendicularly to the airstream. Both kerosene and hydrogen csn burn steadily within a wide range of fuel-air equivalence ratio, and their combustion state was compared.

用电弧加热空气,对带有突扩台阶的扩张形超燃冲压发动机燃烧室进行了实验研究.燃烧室入口Ma=2.1,总温、总压分别约为1200K和0.7MPa.燃料以垂直或平行于气流的方式喷射,采用氢气或煤油,均能在广宽的当量比范围内稳定燃烧.同时,也比较了它们的燃烧状况.

Two calculation methods on equivelence ratio of multi-propel-lant for propulsion system are presented in this paper. One is"mixed gas method", and another is "equivelence fuel air ratio method". There is no limit to the number of fuel and oxidant species used simultaneously. A compound engine which consists of rocket ramjet, turbo-jet and after-burner is taken as an example. The fuels used are liquid hydrogen, methane, propane and kerosene. The oxidants used are liquid oxygen and air.

提出了两种计算燃料和氧化剂当量比的方法。方法之一是“混合气法”;假方法之二是“当量油气比法”。燃烧过程中使用的燃料种类数及氧化剂种类数均没有限制。还假设了一个组合发动机作为例题。它包括火箭发动机、冲压发动机、涡喷发动机及加力燃烧室。使用的燃料为液氢、甲烷、丙烷和航空煤油。氧化剂为液氧和空气。

 
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